Store array information in extended memory (128kb)

[rbiondi]

Hello,

Is it possible storing arrays and/or Strings in Zx Spectrum Extended Memory (128kb)? 
How could this would be accomplished?

Thank you very much!
Rogerio

[funkheld]

spectrum 128 and banking.
https://worldofspectrum.org/faq/referenc...erence.htm

write data into bank 1, 3 and 4.

switch to the bank and always get the data from $c000.

the data from the bank is always in $c000.

greetings






 mey demo , greeting from germany:
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Code:

#Include <SP/Fill.bas>
#include <memcopy.bas>

DIM wert AS UInteger

Sub fastcall _bank(n as UByte)
ASM
  ld c, a  ; A register contains the n parameter
  ld a,(0x5b5c)
  and 0xf8
  or c ;bank N auswählen
  ld bc,0x7ffd
  di
  ld (0x5b5c),a
  out (c),a
  ei
END ASM
end sub

CLS

_bank(3)
for wert=$c000 to $c000+6143
  poke wert,129
next wert

_bank(4)
for wert=$c000 to $c000+6143
  poke wert,255
next wert

_bank(1)
for wert=$c000 to $c000+6143
  poke wert,137
next wert

do
    IF INKEY$ = "q" THEN
      _bank(1)
      MemMove($c000, $4000, 6144)
end if
IF INKEY$ = "w" THEN
      _bank(4)
      MemMove($c000, $4000, 6144)
end if
IF INKEY$ = "e" THEN
      _bank(3)
      MemMove($c000, $4000, 6144)
end if 
loop

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You can also get the data from $c000 and bring it to $c000 with poke/peek.

greting

[rbiondi]

Thank you very much for your help!

Kind regards,
Rogerio